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Amphastar Pharmaceuticals (AMPH) Stock Chart & Stock Price History

Amphastar Pharmaceuticals logo
$27.27 -0.79 (-2.82%)
Closing price 04:00 PM Eastern
Extended Trading
$27.28 +0.02 (+0.06%)
As of 06:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
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Amphastar Pharmaceuticals Stock Price Performance

The Amphastar Pharmaceuticals (AMPH) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 43.29%, with a year-to-date return of -26.56%. In the past month, the stock has decreased 8.58%, reflecting recent market activity.

As of the latest close, Amphastar Pharmaceuticals traded at $28.06 with a market cap of $1.30 billion and volume of 273,491 shares. Five years ago, the stock traded at $19.50, representing a 39.85% increase over that period. At the time, it had a market cap of $933.09 million and a volume of 184,659 shares.

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5 Day
Performance
-3.98%
1 Month
Performance
-8.58%
3 Month
Performance
+5.62%
Year-To-Date
Performance
-26.56%
1 Year
Performance
-43.29%
5 Year
Performance
+39.85%

AMPH Stock Chart for Monday, September, 15, 2025

AMPH Chart by TradingView

Amphastar Pharmaceuticals Stock Price History

Export to Excel
DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
09/15/2025$28.06$27.27
-2.82%		$28.39$27.23422,795 shs$1.30 billion
09/12/2025$28.68$28.06
-2.16%		$28.86$27.91273,491 shs$1.30 billion
09/11/2025$28.40$28.68
+0.99%		$28.89$28.36422,254 shs$1.33 billion
09/10/2025$29.33$28.40
-3.17%		$29.26$28.34297,838 shs$1.32 billion
09/09/2025$29.26$29.33
+0.24%		$29.43$28.99379,382 shs$1.36 billion
09/08/2025$29.42$29.26
-0.54%		$29.41$28.49385,596 shs$1.36 billion
09/05/2025$29.19$29.42
+0.79%		$29.78$28.98414,943 shs$1.37 billion
09/04/2025$29.39$29.19
-0.68%		$29.59$28.88553,530 shs$1.36 billion
09/03/2025$30.81$29.39
-4.61%		$31.10$29.29566,956 shs$1.37 billion
09/02/2025$30.62$30.81
+0.62%		$31.26$30.44414,770 shs$1.43 billion
09/01/2025$30.62$30.62$30.81$30.18290,925 shs$1.42 billion
08/29/2025$30.26$30.62
+1.19%		$30.81$30.18290,925 shs$1.42 billion
08/28/2025$30.49$30.26
-0.75%		$30.56$29.86316,391 shs$1.41 billion
08/27/2025$30.34$30.49
+0.49%		$30.95$30.10326,043 shs$1.42 billion
08/26/2025$29.83$30.34
+1.71%		$30.80$29.93408,345 shs$1.41 billion
08/25/2025$30.50$29.83
-2.20%		$30.55$29.47374,382 shs$1.39 billion
08/22/2025$29.66$30.50
+2.83%		$30.90$29.98494,895 shs$1.42 billion
08/21/2025$29.62$29.66
+0.14%		$30.42$29.43491,388 shs$1.38 billion
08/20/2025$30.33$29.62
-2.34%		$30.39$29.42434,164 shs$1.38 billion
08/19/2025$29.76$30.33
+1.92%		$30.99$29.85527,802 shs$1.41 billion
08/18/2025$29.83$29.76
-0.23%		$30.65$29.58433,135 shs$1.38 billion
08/15/2025$30.21$29.83
-1.26%		$30.63$29.82651,991 shs$1.39 billion
08/14/2025$30.48$30.21
-0.89%		$30.63$29.64464,374 shs$1.40 billion
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This page (NASDAQ:AMPH) was last updated on 9/15/2025 by MarketBeat.com Staff
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